A Child Youth and Family social worker, who cannot be named, said Ricco's mother had been addicted to methamphetamine and was prescribed methadone in a bid to get her off the drug.
When she became pregnant her baby was exposed to the methadone in the womb and when born, needed to be given morphine while he was weaned off methadone.
The court has also heard that when the child was placed with caregivers that no special treatment was required in relation to his treatment with morphine for the methadone addiction.
A Child Youth and Family practice leader said he was regarded as a normal baby.
The inquest is continuing this afternoon.